Improvement in permutation padlocks



SAMUEYLLOYD. Improvement in Permutation Pad Lock s.

No. 120,822 Patented Nov-14,1871.

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PATENT OFFICE.

SAMUEL LOYD, OF NEW YORg, N. Y.

IMPROVEMENT IN PERMUTATION PADLOCKS.

Specification forming part of Letters Patent No. 120,822, dated November14, 1871.

To all whom it may concern:

Beit known that I, SAMUEL LOYD, of the city, county, and State of NewYork, have invented certain Improvements in Permutation Padlocks, ofwhich the following is a specification:

The object of my invention is to construct a simple and strongpermutation padlock in which the combinations are set and the lockunfastened by turning the dial to certain known figures, and requires nokey; and it consists in the flanged tumblers placed one within theother, the outer one of which has the graduations of the dial markedthereon, in combination with the adjustable curved spring for changingthe combinations and the step-shaped notches of the hasp.

Figure 1 is a front view of a complete lock, showing the dial markedupon the outer revolving flanged tumbler, which also serves as a knob orhandle. Fig. 2 is a sectional view of the lock on the line 00 w of Fig.4. Fig. 3 shows a sectional view of the lock on the line 3 y of Fig. 4.Fig. 4 is a sectional view of the lock on the line 2 z of Fig. 3. Fig. 5shows the peculiar form of the in ner flanged tumblers.

As shown in the accompanying drawing, the flanged tumblers A A are inthe form of caps, one fitting within the other, the inner one turningupon a shaft, Gr, attached to the outer one, and are pressed together bya spiral spring, B. The projecting flanges a a of the tumblers A A fitinto corresponding notches in the hasp C. These notches are madestep-shaped, as shown in Fig. 4, thereby forming a strong catch, andrequire no space to be left between the flanges of the tumblers. Thehasp is thus held by thev tumblers, and can only be withdrawn when thegateways D D of the tumblers are in proper position. A curved spring, E,is placed within the lock-case, and is held in position by its pressureupon the sides of the case, and can therefore be changed to diflerentpositions for the purpose of changing the combinations of the lock. Oneend of this spring is bent inward so as to engage with a pin, F, uponthe inner tumbler A, for the purpose of holding said tumbler while theouter tumbler A is revolved, until the gatings I) D are broughttogether; then, by reversing the movement, both tumblers move togetheruntil the gatings D D come opposite the notched end of the hasp 0, whenthe hasp can be withdrawn. The outer tumbler forms the face of the lockand has the graduations of the dial marked thereon. It is also providedwith a center-shaft, G, which passes through the back plate of the lock,and serves as a rivet to fasten the lock together. If desired, the shaftG could be made of a separate piece and both of the tumblers made toturn thereon. Fig. 6 represents flanged tumblers of an equal size placedon both sides of a barbed hasp, showing the principle of flangedtumblers, but with features difl'ering from those claimed by theapplicant.

I claim as my invention The flanged tumblers A A, fitted one within theother, the outer one of which having the dial marked thereon, incombination with the adjustable curved spring E and the step-shapednotches of the hasp G, substantially as and for the purpose set forth.

. SAMUEL LOYD.

